This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 144 |
| 7 | 1440 |
| 8 | 2880 |
| 9 | 120960 |
| 10 | 1451520 |
| 11 | 87091200 |
| 12 | 1902071808000 |
| 13 | 15184923989114880000 |
| 14 | 808017424794512875886459904961710757005754368000000000 |